Fluid and melt properties at high pressures and temperatures


Speciation and solubility in aqueous fluids determined using Raman spectroscopy

Sn(IV) speciation in an experiment with cassiterite (SnO2) and 1.63 molal HCl solution determined in situ using Raman spectroscopy
Experimental data for the solubility of cassiterite (SnO2) in H2O+HCl at 500 and 600 °C
Partitioning of tin between peraluminous felsic melt and H2O+HCl fluid

Complexation of heavy elements, solubility in aqueous fluids, fluid-melt partitioning, and kinetics of mineral/melt-fluid interaction determined from synchrotron-radiation absorption and fluorescence spectroscopy and modified HDAC

Complexation of heavy elements, solubility in aqueous fluids, fluid-melt partitioning, and kinetics of mineral/melt-fluid interaction determined from synchrotron-radiation absorption and fluorescence spectroscopy and modified hydrothermal diamond-anvil cells

In situ XRF/XAS experiments at synchrotron radiation facilities (example: microfocus beamline ID22, European Synchrotron Radiation Facility, Grenoble).
X-ray absorption near edge spectra (XANES) of Zr K-edge collected in-situ on various aqueous fluids at indicated pressures, temperature and compositions (NS3: Na2Si3O7; NS3Al1: NS3 + 1 wt% Al2O3; NS3Al5: NS3 + 5 wt% Al2O3; zrc: synthetic zircon). Modified from Wilke et al. (2012) Earth. Planet. Sciences Letters, 349-350, 15-25.
Chromium concentrations in the fluid determined in situ using synchrotron-radiation X-ray fluorescence analyses during dissolution of eskolaite (Cr2O3) in H2O + 5.7 mass% HCl along two isochores (fluid density 0.77 g/cm3 or 0.93 g/cm3). Modified from Watenphul et al. (2014).

Contact person:

  • Dr. Christian Schmidt

Cooperation:

  • Prof. Max Wilke, Potsdam University

Dynamic structure of water and aqueous fluids from Raman spectroscopy, inelastic X-ray scattering, and ab-initio modelling

Beamline setup for inelastic X-ray scattering at ID 16, ESRF, Grenoble. From Sahle (2011) (Dissertation TU Dortmund).
Schematic drawing of hydrothermal diamond anvil and beam path. From Sahle (2011) (Dissertation TU Dortmund).
Dynamic structure factor at the O K-edge acquired on H2O at the conditions indicated. From Sahle (2011) (Dissertation TU Dortmund).
 

Sahle, C. J., Sternemann, C., Schmidt, C., Lehtola, S., Jahn, S., Simonelli, L., Huotari, S., Hakala, M., Pylkkänen, T., Nyrow, A., Mende, K., Tolan, M., Hämäläinen, K., Wilke, M. (2013): Microscopic structure of water at elevated pressures and temperatures. Proceedings of the National Academy of Sciences of the United States of America (PNAS), 110, 16, 6301-6306. Doi: 10.1073/pnas.1220301110.

Contact person:

  • Dr. Christian Schmidt

Cooperation:

  • Prof. Max Wilke, Potsdam University